Horse-rake tooth



(No Model.)

W. H. PATTI-1N.

HORSE RAKE TOOTH. P

No. 375,892. Patented Jan. 3, 1888.

Wdznesses: Invert/Z02? UNITED STATES PATENT Orrrcn.

IVILLIAM H. PATTEN, OF CANASTO'IA, NEW YORK.

HORSE-RAKE TOOTH.

SPECIFICATION forming part of Letters Patent No. 375,892, dated lanuary3, 1888.

Application filed Novcmber 11, 1886. Serial No. 218,647.

To all whom it may concern:

Be it known that I, WILLIAM H. PATTEN, of Oanastota, in the county ofMadison and State of NewYork, have invented certain new and usefulImprovements in Horse-Rake Teeth; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form part of thisspecification.

My invention relates to an improvement in wheel-raketeeth, hereinaftermore fully pointed out and claimed.

In the accompanying drawings, Figure lrepresents a side View of myimproved tooth. Fig. 2 represents an edge View of the same. Fig. 3represents a cross-section on line A B, an?) Fig. 4 represents across-section on line Heretofo re rake-teeth have been constructed inoblong shape in cross-section, which has been found in use to beobjectionable for the reason that they have not the required elasticityat the point where the strain comes, which produces excessive breakagein the teeth and renders the same objectionable in passing obstructionsin raking; but the same for the reasons .stated have been substantiallydiscarded. Ron nd teeth have also been provided and used for many yearsas less objectionable than other forms of teeth. These, however, arefound in use to have points of objection, prominent among which are,first, a tendency to wear round at the point, and, second, the strain ofthe tooth in heavy rakingis from the point to its head, which renders itquite ob- 0 jectionable when the rake issubjected to heavy work.Rake-teeth have also been heretofore provided with flattened pointshaving a con- (No model.)

edge of the flattened portion of the tooth in such shape that the toothengages and holds fast to obstructions with which they come in contact,and where the front flattened portion of the tooth is broader than therear or convex heel difficulty is encountered in raking damp or wet hay,the peculiar construction of the tooth being such that the hay will clogon the point.

For remedying the defects pointed out in other forins of teeth, whetherround or oblong in cross-section throughout their entire length, Iprovide teeth partially round and partially flat in crosssectionthroughout their length, so apportioned as to give the proper elasticityto the tooth at the point where the elasticity is required and to removethe elasticity from that part of the tooth where it is objectionable. Iattain these beneficial results by providing steel bars rolled or forgedround in cross-see .tion throughout their length of suitable size,

the same being curved intoshape rcquiredfor use on wheel-rakes, theupper portion of the tooth having suitable convolutions,ifrequired. Atabout one-third the length of the tooth from the point the tooth-iswidened and flattened, and the width and thickness of the flattened partare uniform through out their length, the flattened portion of the toothbeing the part next to the point, thereby reducing the quantity of stockrequired in a round tooth in cross-section of the same length. Byflattening and widening thelower portion of the tooth in cross-sectionthe springing tendency thereof encountered in round teeth is overcome inthat part of the tooth which is flattened. The flattened portion of thetooth at the point is then cut off in astraightline, forming an acuteangle at the inner point of the tooth, thereby forming a widewearingsurface, obviating the objectionable feature of the flattenedpoint having a convex heel. By this construction the tooth is formedwith front and rear lines of the curve substantially parallel with eachother from the beginning of the flattened portion to the point of thetooth, thereby preventing clogging of the hay at the point of the toothin damp raking and enabling the teeth to be freed with case from the haywhen the rake is dumped.

By flattening the teeth upon their side from wearing-surface until theteeth are worn out.

\VhatI elai m as new, and desire to secure by Letters Patent, is-

1. A round curved rake-tooth flattened on its sides from near the middletoward the point, the front and rear lines of the curve substantiallyparallel with each other from the beginning of the flattened portion ofthe tooth to the point, forming a broad section, and the point out fromrear to front in a straight line,

forming an acute angle on theinner frontpoint of the tooth,substantially as set forth.

2. A round spring rake-tooth flattened on its 20 sides 'from nearthemiddle of the tooth to the point thereof, the front and rear lines ofcurve substantially parallel with each other, and having the flattenedend out in straight line from front to rear, forming an acute angle on25 the front point of the tooth and awide straight wearing-surface 0nthe lower end of the tooth.

In witness whereof I have affixed my signa lure in presence of twowitnesses.

\VILLIAMI H. PATTEN.

"Witnesses:

EDWIN H. RIsLEY 'D. MoGUoKEN.

